The attrition is going to be high anyhow, tons of stuff gets damaged during shipping, handling and stocking, tons more is never sold.
Most large stores take out nearly everything off the shelves at night even if it's still within it's "use before" date which on it's own is utterly nonsensical to begin with as most items don't expire for days, if not weeks, months and even years from the "use/best before" date.
People drop stuff, people mishandle goods, how many people squeeze a vegetable or a fruit to check if it's ripe damaging it? how many apples get a mushy spot because they banged around in the crate?
You are literally scraping the bottom of the barrel of inventory attrition when you are talking about perishable misplaced items, compared to everything else they are a rounding error.
There is a lot of loss baked into every supply chain, unless you are going to change it in it's entirety really don't bother with the end, the loss at the point of sale is minimal compared to everything else.
